Business Combinations (Tables) (BioVex Group Inc [Member])

12 Months Ended

Dec. 31, 2011

BioVex Group Inc [Member]

Business Combinations [Line Items]

Aggregate acquisition date consideration to acquire an entity

Cash paid to former shareholders of BioVex	$	407
Fair value of contingent consideration obligations		190
Total consideration	$	597

Allocation of the total consideration to the acquisition date fair values of assets acquired and liabilities assumed

Intangible assets — IPR&D	$	675
Goodwill		170
Deferred tax liabilities		(246	)
Other assets (liabilities) acquired, net		(2	)
Total consideration	$	597